Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1)

Continuous quantum measurement for general Gaussian unravelings can exist




Julkaisun tekijät: Megier N, Strunz WT, Luoma K

Kustantaja: AMER PHYSICAL SOC

Julkaisuvuosi: 2020

Journal: Physical Review Research

Tietokannassa oleva lehden nimi: PHYSICAL REVIEW RESEARCH

Lehden akronyymi: PHYS REV RES

Volyymi: 2

Sivujen määrä: 8

DOI: http://dx.doi.org/10.1103/PhysRevResearch.2.043376


Tiivistelmä
Quantum measurements and the associated state changes are properly described in the language of instruments. We investigate the properties of a time continuous family of instruments associated with the recently introduced class of general Gaussian non-Markovian stochastic Schrodinger equations. In this article we find that when the covariance matrix for the Gaussian noise satisfies a particular delta-function constraint, the measurement interpretation is possible for a class of models with self-adjoint coupling operator. This class contains, for example the spin-boson and quantum Brownian motion models with colored bath correlation functions. Remarkably, due to quantum memory effects the reduced state, in general, does not obey a closed form master equation while the unraveling has a time continuous measurement interpretation.


Last updated on 2022-17-01 at 11:18